Apparatus for applying frictional coverings to the laminations of friction clutches and the like



Jan. 26, 1932. H. KATTIWINKEL APPARATUS FOR APPLYING FRICTIONAL COVERINGS TO THE LAMINATIONS OF FRICTION CLUTCHES AND THE LIKE Filed March 9, 1928 Ian Patented Jan. 1932 i r ,ms mwmnp, or ooswrer, GERMANY I pingnvsaeaa rmma rniorronnncovnnrnesro trnn' LnmmA'rIoNs on r i n crron CLUTGHES annexing LIKE fWnp ucauon madman; 192s, SerialNo. 260,409, and m eerjman iaauary 3'1, 192?.

l "Myinyentionrelates-tothe manufacture of friction bodies for-brake and clutch purposes,

a and: more "particularly to-the manufactureof --friction rings for laminated disc clutches. A W method of manufacturingsuch friction rings by pressing l a frictional material," consisting ,of a fibrous structure saturated witha binding medium that subsequently hardens, in a p stillqplastic conditiomdnto interruptions in U 1}, an annulardiscfofsheet steel is already known. TMYwPI'QSGIllStilIVBDtlOIl "relates to means for pressing the. frictional material gintoland on saidlaminations simultaneously i from both sides withthe requisite accuracy 11; and reliability on mass production lineal 1 My invention isillustrated by Way it of example in oneconstructional form in the" accompanying drawings wherein,

apparatus asa Wholeawith a portionaofthe plunger of a press, I

JEIOIILODBnSlIlOthQIY, a

FigsfBa and3b show the pressing apparayationsthrough the centre at two dilferent Istages'inthework; v i 1 w aThe drawings arehbased-upon a construcfi 'rib tional form which is intended for pressing frictional material in; the form of round disc w'bodies intotheannular friction discs of laminated disc clutches. f theapparatus, substantially, only the actual press mould,*w1th theswagesand the working mechanism directly connected therewith, is SllOWILu The pressitselflwhich maybe an ordinary eccentrio ress isomitted, since it is unnecessary foryt eexplanation"oftheinventionr parts, a lower ramcarrier a resting upon the a table of the'press, a lower lswage member I),

an upper swage member a, amember (Hocking,

together thesetwo partsto forma singlebody 5 545 hereinafter designatedan outer swage, and a 1 leyer mechanism f guiding the outer swage.

a; Figijl is" a perspective viewof the pressing 1ikewiseinperspective the individual parts ofthe apparatus separated tus more diagrammatically Tin sectional ele- LFhe press-mouldiconsists essentially of six The lower member 6 the outerswage forms amass ive annular body, which is supported on the ,under side at 4. y To the upper side-are secured gtwolisegmental pieces 17 and 8, by

which a recess- 5 "is formed, which passes transversely acrossthe swage, and in itsf outlinewcorresponds exactlyitolthat of a corre J spending segmental part of thering of sheet l material to be. h providedljwith the frictional 7 covering. One plece ofsuch armg'otsh'eet 7 material is shown in Fig; 1, and denoted by 20: ln thecentrethe swage member Z) has ahole tf-passing througlrityf a .The upper member oofthe outer swage consists ,of a massive; disc, which is provided i at; opposite points with radial projecting ,handles 9, ,9, and with peripheral notches 10, in staggeredrelationship thereto. Furthermore, upon the upper side ofthe disc,

"at two opposite 1 points are 5 provided wedge- '70 'shaped cams11,11; The disc 0 is "likewise bored throughat the centre; Thebore 6 Lin question ;corresponds in diameter 130 the a bore Gin the lowermemberb. y The'members b and aof thecentre swage admit" of being connected lrigidlyf with one another by the locking member d, shownin Fig.2. The flockingymember consistsof an annular body 12,Which1 is provided-laterally w htw hand s 13, 3 nd-w c j ng se so bymeans of i an inwardly directed projection with the stop {Lfon'the lower member of thecentral swage, and of twofl upwardly difrected arms 14, theupper ends ofwhich are bent inwards to formhooksP The arms 14 engage inythe notches 10 in the upper menu- 0, while the hooks 15 of' the arms 1%, uponthe locking member being rotated relatively to the upper member 0, run up on to the oblique ,c'ams 11, andthereby clamp the twopartsjof-"the swage firmly together. The lower memberlb of the outerswage isprovided laterally with two pegs 16 opposite to one another, in which' there engage arms of a slngle-armed lever system fdenoted as awhole byf, whichis firmlysuplportedrat 1*8ianditheflfree endof Which is pivotally *connected at p by a pull rod 19 with the reciprocating plunger P of a press of i usual;construction; The dimensions of lee the lever device are so selected that the path traversed by the swage guided by the lever arms during the working of the press is half as great as the path of the head ram 6, the.

peg 21 of which fits into the bore 6 in the upper member 0 of the swage.

The'method of working of the apparatus is as follows :After the upper member 0 of the swage has been unlocked and removed, the plastic frictional material is introduced ,intothe lower swage member (see Fig. 8a)

which is held by the springs-3 in a raised position limited by fixed steps,the said frlctional material consisting for example of a somewhat dried mixture of asbestos fibres with an alcoholic solution of bakelite. After the cavity 6 in the swage member I), which is closed atthe bottom by the ram 2, is quite filled up with thematerial, the sheet steel ring 20 is fitted into the recess 5.- The projections inthe sheet metal ring that fit into the corresponding toothed wheel-like recesses provide for the discontinuity in the sheet metalring, which is to be provided with the friction body, to register with the bore 6. The interruptions in the sheet metal ring, as indicated by Figs. 3a and 3b, are somewhat smaller than the pressure spaces 6 and 6a of the swage. After putting in the sheet metal ring 20, the upper swage member a is put. on and locked tothe lower member.

The pressureyspace 6a in the upper swage member is then likewise filled with the frictionalmaterial, up to a level which maybe indicated by a mark and which corresponds to the depth of the lower filling. The press lamination 2 0,without the la't'ter being itself subjected to any compressivestress in either direction. This is important, amongst other things, because the compressionpressure is very heavy, so that in the eventof the stress being one sided, a distortion of the sheet metal lamination towards the other sidewould be the inevitable result. The frictional material, as ig. 36 indicates, is very considerably compressed, in practice to about ,one-eighth or one-tenth of its original volume; 7 At the same time'it receives its final form, so that no subsequent treatment'is necessary. During the return of the head ram 6, the swage is pressed upwards again by the springs 8. Then after the locking of the two swage members I) and'o is released,

the upper part 0 can be removed and the sheet'metal ring20 displacedby' one division,

for the purpose of filling up the next interruption with frictional material.

The invention is of course not limited to the pressing of frictional material into the interruptions in clutch laminations of the kind illustrated in the drawings, but may be employed wherever it isaquestion of providfriction discs or the like with frictional coverings on both sides. The covering pieces need not even be of the round shape assumed in the present case but maybe in the shape of segments bounded by'radial or other straight lines. It is also'possible for the covering pieces to, be arranged in direct connection with one another in the peripheral direction. Finally, the pressing apparatus, While adher ing to the principle of. the. invention, would admit of being differently constructed in such a Way that friction rings of the kind mentioned are provided upon their entire periphery from both sides with unitary coherent coverings.

I claim: a

.1. In'anapparatus of the character described, a swage consisting of two parts providedwith molding cavities therein and constructed to secure between the parts a portion. .of an annular sheet metal .disk having a hole therein substantially between said cavities"; a stationary pressure member in one of said cavities; a movable pressure member in the other-cavity movable relative to the swage and the stationary member; and means supporting said swagefor movement in the same dlIQCiilOll'WlthQUt being directly engaged by the latter. V

2. In an apparatus of the character described, a swage consisting of two parts provided with molding cavities therein and constructed to receive between the parts a portion of an annular sheet metal disk having a hole therein between said cavities; means for clamping said swage parts together with said portion therebetween; a stationary pressing member inone of said cavities, said swage being mounted for: sliding on said stationary member; a ram in the other cavity; and means operable .for moving said swage with the ram in the same'direction and at less than the speed of the ram during the whole stroke of the latter.- v

3. In an apparatus of the character described, a swage consisting of two parts provided with alined' molding cavities therethrough and constructed to securely receive between the parts a segmental portion of an foraminous annular sheet metal disk with one of its holes between said cavities; means for clamping said swage parts together with said segmental portion therebetween; a stationary pressing member in one of said cavities; a ram in the other cavity; resilient means for supporting the swage'; and a lever mechanism adapted to move said swage with the ram in the same direction and at less than the speed of the ram dnring the whole stroke of the 4. In" an apparatus of the character described, a swage consisting of twoperts pro- 'vided with molding cavities therein and adapted to hol clbetween the parts apart of ametal sheetdischaving a hole therein substantially between said cavities; a stationary pressing member in one of said cavities; a ram in the other cavity movable toward and from the stationary member; and means supporting said swage and permitting it to move simultaneously with saidram in the same di- 7 j rection but at lessspeed than the ram, without being directly engaged by the latter.

In testimony whereof I afiix my signature. V y HANS KATTWINKEL. 

